Identify Wall Material and Inherent Weaknesses

What happens here

Clearly identify the material of the existing retaining wall. In this case, it is a timber retaining wall. The narrator emphasizes that timber retaining walls are inherently prone to failure over time, describing them as 'doomed to fail' and that their failure is 'almost always just a matter of time'. This highlights the inherent weaknesses of timber as a retaining wall material, especially when directly exposed to soil and moisture.

Goal: Recognize the type of retaining wall and its typical lifespan/failure modes.